No direct confirmation, but presumably some variation on "Don't torture/kill bringers of bad news and pointer-outers of flaws in plans." Probably also some version of "Don't send trusted lieutenant for really important things."

[...] but I think some part of me did not want to go back to playing solitaire instead of chess. It was when I had the prospect of creating another Tom Riddle to plot against, someone even more worthy than Dumbledore, that I was first willing to contemplate the end of my war. [...] I would never have espoused such a policy deliberately. It would have violated Rules Nine, Sixteen, Twenty, and Twenty-two and that is too much even if you are enjoying yourself.

Not explicitly stated, but these Rules are probably about not letting yourself be drawn into the game. Possible overlap with the Evil Overlord List:

Sixteen: I will never utter the sentence "But before I kill you, there's just one thing I want to know."

Twenty: Despite its proven stress-relieving effect, I will not indulge in maniacal laughter. When so occupied, it's too easy to miss unexpected developments that a more attentive individual could adjust to accordingly.

for completion's sake, here are the others, which seem less relevant. but, not worth disregarding.

Nine: I will not include a self-destruct mechanism unless absolutely necessary. If it is necessary, it will not be a large red button labelled "Danger: Do Not Push". The big red button marked "Do Not Push" will instead trigger a spray of bullets on anyone stupid enough to disregard it. Similarly, the ON/OFF switch will not clearly be labelled as such.

Twenty-two: No matter how tempted I am with the prospect of unlimited power, I will not consume any energy field bigger than my head.

I'm really interested in seeing what the other rules are too! In addition to the Evil Overlord List linked above, you might be interested in The Seventy Maxims of Maximally Effective Mercenaries. Maxim 43 is my personal favorite: "If it's stupid and it works, it's still stupid and you're lucky."

In retrospect it would have been better if I had sent Bellatrix to the Potters' home in my place; but I had a Rule telling me that for such matters I must go myself and not try sending a trusted lieutenant.

Number 5: The artifact which is the source of my power will not be kept on the Mountain of Despair beyond the River of Fire guarded by the Dragons of Eternity. It will be in my safe-deposit box. The same applies to the object which is my one weakness.

I suspect Dumbledore has considered this one, and that Voldemort has not. Why go to the trouble of placing all this when a vault at Gringotts is presumably at least as secure? Perhaps this is -as Quirrell himself noted - a blatant trap.

Incidentally, the main problem with this kind of misdirection is that, unless Dumbledore correctly guessed that Voldemort was bluffing, he believes that Voldemort would be able to determine the location of the stone magically.